5) given the following PM modulated signal equation, determine the original message equation, m(t) . s(t)= 3.5cos(2π2E9t + 0.5cos(2π6000t)), Kp=0.1 (hz/v)
a) m(t)=0.16cos(2π6000t)
b) m(t) = 5cos(2π6E3t)
c) m(t) = 5cos(2π2E9t)
d) m(t) = 0.16cos(2π2.4E9t)
6) given the following message and carrier waves. Determine the AM signal equation and (DSB-LC) bandwidth: m(t) =2sin(2π10KHz*t). c(t) =3sin(2π2.4E9Hz*t)
a) 5[1+0.6sin(200πt)]sin(2π10E9t), BW=10kHz
b) 3[1+0.67 sin(2π10E3t)]sin(2π2.4E9t), BW=20kHz
c) 3[1+0.6sin(2.4GHz*πt)]sin(2π10E3Hz*t), BW=20kHz
d) 3[1+1.67 sin(2π50t)]sin(2π10E9tt), BW=10kHz
7) amplitude used in a communication path will increase both signal and noise power, whereas digital repeaters will improve SNR
1. true
2. false
8) Select the correct statement(s) regarding the signal-to-noise ratio (SNR)
a. Thermal noise plays a predominant role in the noise floor power
b. An increase in signal power results in an increase in SNR
c. Increasing the noise floor results in a decrease in SNR
d. All statements are correct
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5) given the following PM modulated signal equation, determine the original message equation, m(t) . s(t)=...
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